Apparatus for feeding comminuted fuel to furnaces, &amp;c.



No. 657.537. Patented Siepi. ll, I900. J. F. HAY.

APPARATUS FOR FEEDING COMMINUTED FUEL T0 FURNACES, 81.6.

(Application filed Dec. 27, 1899.)

(No Model.)

WITNESSES:

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ATTORNEY.

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UNITED STATES PATENT OFFICE.

JOHN E. HAY, or ERIE, PENNSYLVANIA, ASSIGNOR To .1; P. EToALE, B. J. WALKER, AND G. R. METOALF, OF SAME PLAcE.

APPARATUS FOR FEEDING COMMINUTED FUEL TO FURNACES, &c'.

SPECIFICATION forming part of Letters Patent No. 657,537, dated September 11, 1960.

Application filed December 27, 1899. Serial No. 741,713. (No model.)

To itZZ whom it may concern: Be it known that I, JOHN F. HAY, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Apparatus for Feeding Comminuted Fuel to Furnaces and the Like; and I do herebydeclare the following to be afull, clear, and exact description of the invention, I such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to apparatus for feeding com minuted fuel to furnaces and the like; and it consists in certain improvements in the construction thereof, as will be hereinafter fully described, and pointed out in the claims. With apparatuses heretofore de-; signed for this purpose great difficulty has been experienced in effecting a continuously uniform feedwhich might be regulated as de-l sired. For this reason in most places where a continuous and uniform heat is desired for a considerable period of time liquid and gase- I ous fuels have been resorted to; but these are much more expensive than com minuted fuel.

The object of this invention is to provide. an apparatus with which comminuted material may be fed in readily-controlledquantities.

The invention is illustrated in the accompanying drawings as follows: T

Figure 1 shows a vertical centrally-located section of the apparatus. Fig. 2 shows a section on the line 2 2 in Fig. 1.

Z marks the furnace, which may be of any desired type; A, the mixer-flue, leading to the furnace; A, a pipe for conveying a blast of air to the mixer-flue; a, a valve for controlling the air-blast to the mixer-flue.

Extending into the mixer-flue is'the feedtube B, having its lower end provided with a beveled edge b, the Wall toward the blast being extended below that toward the furnace, so that the blast in passing by the end of the tube forms asuctiomwhich facilitates the admission of the material into the mixerflue.

Arranged preferably above the mixer-flue is a receiver 0, in which a body of comminuted fuel is stored preparatory to being fed into the furnace. The bottom of the receiver is provided with the hopper-plates c c 0 the plate 0 extending across the bottom, so as to bring the discharge-opening 0 toward the furnace side of the receiver. The plate 0 is deflected slightly inwardly just above the opening 0 and prevents an undue discharge of material from the receiver. below the opening 0 is the plate 0, which I term a retaining-plate, and this checks the discharge of material through the action of gravity. By this arrangement the gravity discharge of the receiver is a relatively-small amount, which is deposited upon the plate 0 when it is checked. Immediately to the rear of the plate 0 there is formed a feeding-blast chamberE,to which air is supplied by the pipe E. This blastis regulated by the valve e. The outlet e 'of the feeding-blast chamber E is immediately between the plate 0 and plate 0 and 'directsthe blast upon the plate C. The opening 6' is small and acting upon the material deposited upon the plate C carries it forward into the fluffingchamber F. The fluffingchamber F is provided with the deflectingsurfacefin front of the opening e,which gives to the blast and to the material carried by it an upward and circular movement which strikes the upper plate cin its action, and this tends to work the fuel 0d the plate 0. A The result is that the comminuted material is fluffed in the chamber F-that is, the particles of which H, by means of which the fiuffed material is concentrated and delivered to the feedingtube Bin the form of a jet. ,Where a feed practically fills the reducer H with the fuel as it is discharged, the continuity of the dischargeis facilitated by making an auxiliary opening-h at the inner side of the. passage through which the air may pass.

In the operation of the device the mixerblast is turned into the pipe A and the feeding-blast is turned into the chamber E. The

blastfrom the chamber E takes up the portion of comminutedmaterial deposited on the Immediately this may be regulated by the valve a,

plate 0, flufis ity in the chamber E, and carries it in the flufied state into the. passage, G The material is concentrated by the reducer H and delivered through the feeding-tube B mixer-blast of course must be regulate'd to accommodate'the amount of fuel fed, and By this arrangement of feeding mechanism coniminuted material may be-fed through anyperiod of-time. v The uniformity of the feed is facilitated by the. introduction of the fluif-i ing-chamber and the concentrator-or red ucer H in the discharge-passage By thus fluffing the material the possibility of the] material becoming sufiiciently dense to form a piston, by means of which the material is subjected to direct pressure, is avoided, and the material is moved simply by impact, so that} the feed iscontinuous. and may be regulated as desired. This. manner of feeding also does not draw the material from the receiver C except to replace material dislodged from they plate C by the action of the blast. A'break between the passage G and the feedpipe is desirable, because it eliminates the influence of blast in the mixerstlue from the fe d r g lat-ion.

Ihave used the term air-blast-"tn describe the gaseous or .si milarlmedium try which thefeeding action is accomplished;butofl course. it is to be understood that any v vapor may be substituted for air, I'hav also 7 use e e ai -blast to descrihe the mo m t o gases th ou h th mixer-liueg and of course this will he also understned as nt including any gas nishing oxygen.'

What I claim as. new 1s..

In an pparawfi dm ee hminnted el, he l i atien of a receiver ha z ea B deflector for deflecting v the blast to! discharge-opening to which the fuel is delin-i ered bygravity; a retardingssurfaee ai Qpening f kin th d sehareeh gravity; and an air-blast mechanis a ranged: to. direct the blast from beneath the f flp i gpon t e. fuel; lodged. upon said retaining-surface and tofeed the'fiuel Y therefrom fuel, h combm t on of-a receiver, hay-mg a dischar p ing, o whic e is 1 ered n n appa atus ferfe i seemminnted yav nr; n f t ns p -s idin s ep niugi to aehamheruneh whiht 0; u l s li-v r dhy avitr; sei chamber; as. ed

.35 'jacent to the reducer for allowing the escape.

.;..0&i.r-;

In an apparatus fon e ding omminuted' fuel, thecombin-ation of receive-r,'hav'i nga:

air-blast. ne tmnsm directed into. the. her from beneath the projecting l i sp u ma e th Mei-se ing 1.1a.

discharge-opening- ,torwhiich the fuel is: de

01? vap r apable: t'f r-u Y n the miffed. State nto an through said passesame-. a redu er at'th is har end arlivered by gravity; a retarding-surface below said opening for checking the discharge by gravity; and an air-blast mechanism arranged jtedirect the blast from beneath the dischargeopening upon the fuel lodged upon said reta ning-surface and to feed the fuel therefrom in proportion to the volume or intensity of the air-blast.

4. In an apparatus for feeding com minut'ed f uel the-com hination offthe receiver, C,-havin g the bottom plate, a, and an opening 0 therefrom to which the fuel is fed by gravity; surface, '0, below the opening; the air-blast mechanism having the opening, 6, in proximity to surface, 0, described; and means for regulating the air-blast.

5. In an apparatus for feeding com min'uted f H61, @11 cemh nat on of the receive 0, a ing the opening, 0 therefrom, beneath which su ace, f; bla tv mech ni m having theopenin pz hition. o direct h b ast again the; material lep qsi fi n the bolt-Boll]- Of t fiqflihg-nhambet, nf-ren Of he cur d surfa e nd pas a e, G, eadi g from h l EDP- part o eaid fl flinghamh Z1 Iua anpa atns,for-f eding omminut'ed eet. the ce ibina en O m ans f r flu fin a. ee a passag for conv y n fl f uehan air-blast arrangedto carry the fuel r ranged to concentrate the fluffed fuel at the -fuel ,the .eomhination of means for [lufling the naberial; a pa a hhvinglan pwa lye d p on connecting with a downwa 'dlfiexten ins 1 3 1 1, at he n of whi is reduced d char -ev in f r on entrifling the; finfi ed mater a nd a a r-blast s age- I t 1% man anparetns. for fe insl mnminn t tehtheeom hinati n Of a meansfo'rdeliv ring ll the fisfied. state; a. Passage. oreonvey- 1 [mechan sm tor f cing-the. ma e l thm h "IQ". I an! enparatns for' e dihg eo tminute finch the comhinati-on of m x r-flu havi a:fee l-'0n ning therein; a blast. .apmratus 8. In an apparatus for-feeding commin uted' mg the fuel the fluifed state; an, jaiiablast is th p ojec in ip rme y h ten ion 7 on th pl te, a h ch he f l i f d y of the blast in the mixer-flue on the feeding of material through the passage, is eliminated an air-blast mechanism for efiecting a feeding action through said passage and a sepa-,

rate blast mechanism for directing a blast to the mixer-flue. i

11. In an apparatus for feedingcomminuted fuel, the combination of a mixer-flue; ablast device therefor; a receiver forstoring the fuel to be used; a separate air-blast mechanism arranged to produce the discharge of the fuel from the receiver; and means for conveying the discharged fuel to the mixer-flue.

12. In an apparatus for feeding comminuted fuel, the combination of a mixer-flue; a blast device therefor; a receiver for storing the fuel to be used; an air-blastmechanism arranged to produce the discharge of the fuel from the receiver; means for conveying the discharged fuel to the mixer-flue; and means for regulating one of the air-blasts relatively to the other.

13. Inan apparatus forfeeding comminuted fuel, the combination of a mixer-flue; a receiver for storing the fuel to be fed; an airblast mechanism arranged to produce the dis charge action from the receiver and to con vey the material discharged to the mixer-flue and a separate blast mechanism for producing a blast in the mixer-flue. a J

14. In an apparatus for feedingcomminuted fuel, the combination of a mixer-flue; a re ceiver for storing the fuel to be fed; an airblast mechanism arranged to produce the discharge action from the receiver and to convey the material discharged to the mixerflue; a separate blast mechanism for produc ing a blast in the mixer-flue; and means for regulating one of the blasts relativelyto the other. 7

15. In an apparatus for feeding comminuted fuel, the combination of a mixer-flue; a receiver for storing fuel to be fed; an air-blast mechanism arranged to produce a discharge action from the receiver; means arranged to regulate the-amount discharged from the receiver, in proportion to the volume or intensity of the air-blast; means for conveying the discharged fuel to the mixer-flue and asepa rate blast mechanism for producing a blast in the mixer-finer 16. In an apparatus,for feeding com minuted fuel, the combination of a mixer-flue;;a receiver for storing fuelto be fed; an air-blast mechanism arranged to produce a discharge action from the receiver; means arranged to,

regulate the amount discharged from the receiver in proportion to the volume or intensity of the air-blast; means forconveyingthe discharged fuel to the mixer-flue; a separate blast mechanism for producing a blast in the mixer-flue; and means for regulating one of the blasts relatively to the other.

l7. In an apparatus for feeding comminuted fuel, the combination of a mixer-flue; a receiver for storing the fuel to be fed, arranged to deliverthe fuel to a discharge-opening; an air-blast mechanism arranged to operate upon the fuel at the discharge opening, and to regulate the amount discharged; means for conveying the fuel discharged to themixerflue and a separate blast mechanism for producing a blast in the. mixer-flue.

18. In an apparatus for feeding com min uted fuel, the combination of a mixer-flue; a receiver for storing fuel to be fed and arranged to deliver the fuel to thedischarge-opening; an air-blast arranged to operate upon the fuel at the discharge-opening and to regulate the amon nt discharged; means for conveying the fuel discharged to the mixer-flue; a separate blast mechanism for producing a blast in the mixer-flue; and means for regulating one of the blasts relatively to the other.

19. In an apparatus for feeding comminuted fuel, the combination of a mixer-flue; a receiver for storing the fuel to be fed arranged to deliver the fuel to a discharge-opening; an air-blast mechanism arranged to operate upon the fuel at the discharge-opening, to regulate the amount discharged and to convey the fuel discharged to the mixer-flue and a separate blast mechanism for producing a blast in the V mixer-flue.

20. In an apparatus for feeding com minuted fuel, the combination of a mixer-flue; a re- 00 ceiver for storing the fuel to be fed, arranged to deliver the fuel to a discharge-opeuing;. an

the amount discharged and to convey the fuel 5 discharged to the mixer-flue; a separate blast mechanism for producing a blast in'the mixerfl-ue; and means for regulating one of the blasts relatively to the other.

21. In an apparatus for feedingcomminuted 1 IO fuel, the combination of a mixer-flue; a receiver for storing the fuel to be fed, said receiver having a discharge-opening, to which fuel is delivered by gravity; a retaining-surface below saidopening for checking the dis- I :5

charge by gravity; an air-blast mechanism arranged to conduct a blast upon the fuel lodged upon said retaining-surface and to feed the fuel therefrom; means for conveying the fuel so fed to the, mixer-flue and a separate r20 blast mechanism for producing a blast inthe mixer-flue. l .22, In an apparatus for feeding comminuted fuel, the combination of a mIXQT-flHG; areceiver for storing the fuel tobe fed; said receiver having a discharge-opening, to which fuel is delivered by gravity; a retaining-surface belowsaid opening for checking the discharge by gravity; an air-blast mechanism arranged to conducta blast upon the fuel lodged upon said retaining-surface and to feed the fuel therefrom; means for conveying the fuel so fed to themiXer-flue; a-separate airblast mechanism for producingablast in the "mixer-flue andmeans for regulating one of said blasts relatively to the other;

23'. In an apparatus for feeding comm inuted fuel, the combination of a flu'ffing-chamber; a, receiver for storing the fuel to be fed',-said re-f ,ceiver being providedwith an opening-enter-x: ing into said .flu fing-chamber, and also being;

, arranged to deliver the material to said open-j. ing by gravity; an air-blast mechanism ia'r-'-{ ing the flufled fuel from the chamber.

ranged to direct a a- ;blastfrom beneath the I opening from-the receiver into the fluffings:

chamber and to produce a feeding action from the receiver-into the fluffing-cb amber and to direct a blast against the fuel in the fluffing chambcrat the discharge-opening; meansfor deflecting a' blast to fiuffthe fuel acted 'upon in said chamber; and a passage for conveya feeding action of .the fuel from the receiver chamber; 4

into the fluffing-chamber; means arranged to regulate the'amount discharged from the receiver in proportion to the volume or intenf sity of the air-blast; meansfor deflecting th air-blast in the fluffing-chamber toflufi the-1 fuel acted upon in'said chamber; and a-pas-"i sage for conveying'the flufied fuel'from-the 25. In anapparatus-forfeeding comminuted fuelrthe combination of a flufling-chamberyareceiver forstoring the-fuel to be fed; an air-f 1 g blast-mechanism arranged to produce-a'ffeede ing action from the receiver into the finding chamber andjtoidirect a blast against, the fueld in'the fluffing-chamber; means for deflecting;

the blast to fluff the'fuel acted upon insa'id chamber; a mixer-flu'e; a passageleading from the flnfiingchamber and arranged-to conveythe fue'l from-the fluffing chamber-toi .the mixe r-flue-and ablast mechanism for pro-;

ducing a blast in the mixer-flue;

26'; In an apparatusfor feeding comminuted fuel, the combination of a finding-chamber; a f receiverfor storing the material to beefed ;gan; 1 mph-last mechanismarra-nged to produce ai feeding action of' the fuelfroin 'thelrecei ver into-the finding-chamber; means arranged to regulate the amount discharged fl'OlIllihB lBe ceiver in proportion 'to thevolume or inten- 5 '2 VVitnes ses BERT Colin,

3 sity ofj'the air-blast; means for deflecting the I assist? .ai'r-b1 $,"-m ithe fluffing-chamber to fluff the fuel acted upon in'sa'id chamber; and a mixer flue} apassage leading from the chamber and arranged to convey the fuel fromthe 'fluffin g chamber to thel'mix'er -flue 'andfa separate blast mechanism for producing ablastin the mixer-flue. I

"1-27 .glnan apparat'us for feeding comminuted fue'L the combination of afluffing-chamber; a receiver-for storing the fuel to be fed; an airblast mechanism arranged to produce a feed- 'ing actionfrom the receiver into the fluffingchamber and to direct a blast against'the fuel in the-Ifiufling-chamber 5 means for deflecting the blast to fluff. the fuel acted upon in said chamber; a passage for conveying said material in a fiuffed state; and a reducer atthe discharge end of the passage for concentrating said material. v i

28. In an apparatus for feeding comminuted fuel, the combination of a fluffing-chamber; a receiver for storing the fuel to be fed; an airblast mechanism arrangedto produce a-feeding action from the receiver into the fluffingchamber and to directa blast against'the fuel in the fluffing-chamber; means for defiecting the blas'tto fiufi the fuel acted upon in said chamber; a mixer-flue; a passage extending from the chamber and arranged to carry the material therefrom in a fluifed state, and to deliver the sameto the mixer-flue; a reducer latthe end ofthe passage for concentrating -the'flulfedfi1el, and a separate'blast mechanism for -producing a blast in" the mixer-flue. a -29. lnanapparatus for f'eed-ingcomminuted flieLthe combination of the mixer-flue; A; a I bl'ast-pip'e;'A,' leading thereto and having fthefregulatingvalve', 11, therein; the feeding-tube, B, extending "into the mixer-flue; i herre iv 0," v the hopp -b and forwardly-projecting plate, e; the blastchamber,.E, extending-through the" opening,

etfa fl er th b n tj tp ,E,p.hav ing- 3a ,regulating-yalve, e, therein; a

- auxiliary -passage h.

flnltesti'mony whereof I aflix my'signature in presence of tvvowitnesses.

1; N'S- BILLING- 

